In a previous study conducted within the Center for Musculoskeletal Research (CMR) on Total Hip Arthroplasties (THA), it was determined that the investigators could simultaneously capture in vivo sound and motion of the femoral head within the acetabular cup during weight-bearing activities for subjects implanted with either a metal-on-polyethylene (MOP), metal-on-metal (MOM) or ceramic-on-ceramic (COC) THA. This was the first study to apply sound analysis as an impulse excitation technique for testing hip conditions and for measuring femoral head sliding in the acetabular component of human hip joints by acoustic means. Unfortunately, no studies have been conducted to compare the in vivo kinematics and sound for subjects implanted using various surgical approaches. It could be hypothesized that subjects having various surgical approaches could lead to an increase or reduction of in vivo hip separation. Therefore, the objective of this study is to analyze a total of 30 subjects implanted with either an anterior (10 patients), anterior-lateral (10 patients), or posterior-lateral (10 patients) surgical approach to determine if any of these surgical approaches leads to less or more in vivo hip separation. All subjects will be analyzed under in vivo weight-bearing conditions using video fluoroscopy to determine in vivo motion.

Patients will have undergone THA using a direct-anterior surgical approach and will undergo fluoroscopy surveillance while walking.

Radiation: Fluoroscopy surveillance of patients while walking

While each subject performs a gait activity (normal walking) under fluoroscopic surveillance on a level treadmill, a data acquisition (DAQ) system will be used to determine the vibrations/sounds occurring during walking.

Other Name: DePuy Orthopaedics hip implant

THA using anterior-lateral approach

Patients will have undergone THA using an anterior-lateral surgical approach and will undergo fluoroscopy surveillance while walking.

Radiation: Fluoroscopy surveillance of patients while walking

While each subject performs a gait activity (normal walking) under fluoroscopic surveillance on a level treadmill, a data acquisition (DAQ) system will be used to determine the vibrations/sounds occurring during walking.

Other Name: DePuy Orthopaedics hip implant

THA using posterior-lateral approach

Patients will have undergone THA using a posterior-lateral surgical approach and will undergo fluoroscopy surveillance while walking.

Radiation: Fluoroscopy surveillance of patients while walking

While each subject performs a gait activity (normal walking) under fluoroscopic surveillance on a level treadmill, a data acquisition (DAQ) system will be used to determine the vibrations/sounds occurring during walking.

Other Name: DePuy Orthopaedics hip implant

Eligibility

Ages Eligible for Study:

40 Years to 85 Years

Genders Eligible for Study:

Both

Accepts Healthy Volunteers:

No

Sampling Method:

Non-Probability Sample

Study Population

Patients implanted with a direct-anterior surgical approach will be provided by Dr. William Barrett of Valley Orthopedic Associates in Renton, WA.

Patients implanted with an anterior-lateral surgical approach will be provided by Dr. of Steven J. MacDonald of the London Health Sciences Center, London, Ontario.

Patients implanted with a posterior-lateral approach will be provided by Dr. David F. Dalury of Towson Orthopaedic Associates, Inc. in Towson, MD.

Be able to actively abduct their operated hip against gravity without difficulty

Must be willing to sign Informed Consent and Health Insurance Portability and Accountability (HIPAA) forms

Exclusion Criteria:

Pregnant, lactating or females not using reliable form of birth control

Patients that do not meet study requirements

Patients unwilling to sign Informed Consent or HIPAA forms

Contacts and Locations

Choosing to participate in a study is an important personal decision. Talk with your doctor and family members or friends about deciding to join a study.
To learn more about this study, you or your doctor may contact the study research staff using the Contacts provided below.
For general information, see Learn About Clinical Studies.

Please refer to this study by its ClinicalTrials.gov identifier: NCT01833481